Home / 20,869.16-28,799.54-11,309.07

Finding the Fourth Proportional to 20,869.16, 28,799.54 and 11,309.07

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Solution

The fourth proportional to 20,869.16, 28,799.54 and 11,309.07 is: 15,606.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.16 : 28,799.54 = 11,309.07 : x
  2. Step 2: Convert to fraction form
    20,869.16/28,799.54 = 11,309.07/x
  3. Step 3: Cross multiply
    20,869.16x = 28,799.54 × 11,309.07
  4. Step 4: Simplify right side
    20,869.16x = 325,695,957.28
  5. Step 5: Solve for x
    x = 325,695,957.28/20,869.16
  6. Step 6: Final answer
    x = 15,606.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.